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Drivers: hv: utils: use memdup_user in hvt_op_write

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commit b00359642c2427da89dc8f77daa2c9e8a84e6d76 upstream.

Use memdup_user to handle OOM.

Fixes: 14b50f80c32d ('Drivers: hv: util: introduce hv_utils_transport abstraction')

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Olaf Hering 2015-12-14 16:01:37 -08:00 committed by Greg Kroah-Hartman
parent c32532162f
commit a9dc0ddf40
1 changed files with 4 additions and 5 deletions
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9
drivers/hv/hv_utils_transport.c
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@ -80,11 +80,10 @@ static ssize_t hvt_op_write(struct file *file, const char __user *buf,
hvt = container_of(file->f_op, struct hvutil_transport, fops);
inmsg = kzalloc(count, GFP_KERNEL);
if (copy_from_user(inmsg, buf, count)) {
kfree(inmsg);
return -EFAULT;
}
inmsg = memdup_user(buf, count);
if (IS_ERR(inmsg))
return PTR_ERR(inmsg);
if (hvt->on_msg(inmsg, count))
return -EFAULT;
kfree(inmsg);